WO1997022747A1 - Fiber structures and process for the production thereof - Google Patents

Abstract

Fiber structures having excellent moisture absorption, soft hand and excellent configurational stability. One embodiment of the fiber structures is one made of cellulosic fibers grafted with hydrophilic vinyl monomers and having a B to W ratio of 0.0001 to 0.005, wherein B is bending rigidity as determined by the Kawabata Evaluation System (KES) and W is a basis weight (the same applies hereinafter). Another embodiment of the fiber structures is one made of the above cellulosic fibers and polyester fibers. A still further embodiment of the structures is one made of the cellulosic fibers and having a shrinking percentage of 3 % or less after washing and a B to W ratio of 0.0001 to 0.005. Yet another embodiment thereof is one made of cellulosic fibers and polyester fibers and having a shrinking percentage of 2 % or less after washing and a B to W ratio of 0.0001 to 0.005.

Description

 Specification

 Fiber structure and method of manufacturing the same

 Technical field

 TECHNICAL FIELD The present invention relates to a fiber structure made of cellulose fiber, which has excellent hygroscopicity and a soft texture, and a method for producing the same.

 Further, the present invention relates to a fiber structure comprising a cellulose fiber and a polyester fiber, the fiber structure having the same or better hygroscopicity as that of the fiber structure made of a cellulose fiber, and having a soft texture. The present invention relates to a method of manufacturing the yohi.

 Furthermore, the present invention relates to a fibrous structure having excellent form stability and a soft texture, and a method for producing the same.

 Background art

 Cellulose fibers are known as typical fibers having hygroscopicity. In recent years, higher levels of hygroscopicity have been required to improve comfort. In addition, a fiber structure using a cellulose fiber and a polyester fiber is inferior in hygroscopicity to a fiber structure including a cellulose fiber. Therefore, in the case of fiber structures made of cotton / polyester blended yarn, improving the hygroscopicity is an issue in order to improve comfort.

 In order to improve the hygroscopicity, it is conceivable to modify the fiber structure by graft polymerization of hydrophilic vinyl monomer. However, in such a technique, since a large amount of the compound generated by the graft polymerization remains between the fibers, the texture of the fiber structure hardens. On the other hand, for morphological stabilization processing of a fibrous structure composed of cellulose fibers or a fibrous structure containing cellulose fibers, resin processing using fibrin-reactive resin or formaldehyde vapor has been performed.

 However, in order to obtain high form stability performance, it is necessary to apply a large amount of resin, and in that case, the texture of the fiber structure hardens. In order to overcome this problem, the use of various types of flexibility has been generally carried out.

In addition, as shown in Japanese Patent Publication No. 7-189139, the sewn product is subjected to shape-stabilizing processing with formaldehyde vapor and then treated with cellulolytic enzyme. A method of processing has been proposed. However, with this method, it is difficult to uniformly enzymatically treat each part of the product, and the problem is that the quality of the sewn product is greatly impaired, and the strength of the fibrous structure is significantly reduced locally. In addition, there was a problem that it was difficult to perform the stabilization process and the enzyme treatment of the sewn products because special equipment was required.

 Disclosure of the invention

 An embodiment of the fiber structure of the present invention is a fiber structure made of a cellulose fiber, wherein a hydrophilic vinyl monomer is graft-polymerized on the cellulosic fiber, and a KES (Kawabata Evaluation System) measurement is performed. This is a fibrous structure in which the ratio B, \ V between the measured bending stiffness (B) and the basis weight (W) according to the above is not less than 0.ϋθϋϋ and not more than () 05.

 This fiber structure is a cellulose fiber structure having a high degree of hygroscopicity that cannot be obtained with a conventional cellulose fiber structure and having a soft texture.

 One embodiment of the method for producing a fiber structure of the present invention is a graph polymerization process in which a fiber structure made of a cellulose fiber is subjected to an impregnation treatment with an aqueous solution containing a hydrophilic vinyl monomer and a polymerization initiator, followed by heat treatment. This is a method for producing a fibrous structure to be subjected to weight reduction processing before or after.

 Another aspect of the fiber structure of the present invention is a fiber structure using a cellulose fiber and a polyester fiber, wherein a hydrophilic vinyl-based monomer is graft-polymerized on the cellulose fiber, and the force KES ( ; Kawabata Evaluation System) A fiber structure whose bending stiffness measurement value (B; ratio between the measured weight (B) and the weight per unit area (W)) is not less than 0 · ϋ001 and not more than (5) .ϋ05.

 The second fibrous structure has the same or better hygroscopicity as the fibrous structure composed of cellulose fibers, has a soft texture, and has a reduced shrinkage compared to the fibrous structure composed solely of cellulose fibers. It has excellent characteristics.

 In another embodiment of the method for producing a fibrous oval product of the present invention, a fibrous structure comprising a polyester fiber and a cellulose fiber is impregnated with an aqueous solution containing a hydrophilic vinyl monomer and a polymerization initiator. This is a method for producing a fibrous structure to be subjected to weight reduction processing before or after graft polymerization processing to be subjected to heat treatment.

In still another embodiment of the fibrous structure of the present invention, a fibrous structure comprising cellulose fibers The washing shrinkage is 3% or less, and the flexural rigidity measured value (B) and the weight per unit weight (W) of KES (Kawabata Evaluation System) flU are not less than 0.00001 (). It is a fibrous structure of not more than 05.

 This fibrous structure is a fibrous structure having morphological stability and a soft texture.

 In still another embodiment of the method for producing a fibrous structure of the present invention, the method for producing a fibrous structure comprises the steps of: This is a method for producing a fibrous product by reducing and heating fibers.

 Yet another embodiment of the male fibrous structure of the present invention is a male fibrous structure using cell orifice fibers and polyester male fibrous material, which has a washing shrinkage of 2 °. And a ratio B.W between the measured bending stiffness (13) and the basis weight (W) by the KES (Kawabaia HvaLu Lion System; measurement) and the weight per unit area (W) is greater than or equal to. It is a structure.

 This fibrous structure has shape stability, has a soft hand, and suppresses shrinkage as compared with a structure composed of only cellulose fibers, and has excellent strength properties.

 Still another embodiment of the method for producing a fibrous structure of the present invention includes a step of performing a cross-linking reaction on cellulose fibers constituting a fiber Wi structure using cellulose fibers and polyester fibers, This is a method for producing a fiber structure in which the cellulose fibers are reduced in weight.

 Embodiment of the Invention

 An embodiment of the fiber structure of the present invention is a fiber structure comprising a cellulose fiber, wherein a hydrophilic vinyl monomer is graft-polymerized on the cellulose fiber, and measured by KE'S (Kawabata Evaluation System). The fibrous structure has a ratio of the measured bending stiffness (B) to the basis weight (W) of not less than 0.001 and not more than 0.05.

 In the present invention, examples of the cellulose fiber include, but are not limited to, natural cellulose fibers such as cotton and hemp, and regenerated cellulose fibers such as rayon, polynosic, cupra, and tencel. .

The fibrous structure composed of cell opening fibers can be a woven, knitted or non-woven fabric substantially composed of cell opening fibers, or a sewn product thereof. What Still, woven fabric, knitted fabric or these sewn products are preferred forms, and woven fabrics or sewn products are more preferred forms.

 The fiber structure of the present invention is obtained by graft-polymerizing a hydrophilic vinyl-based monomer to a cellulose fiber. It is preferable that a hydrophilic vinyl monomer is graft-polymerized inside the single fiber on the cellulose fiber. Since the graft is polymerized inside the single fiber, the durability of the excellent moisture absorption is outstanding, and the texture of the woven or knitted fabric is not hindered. In addition, the fact that the graft polymerization is performed inside the single fiber of the cellulose fiber can be confirmed by, for example, a section staining method. w The piece staining method is performed as follows. The fiber bundle embedded in paraffin is cut perpendicularly to the fiber axis to make sections. After the sections are de-embedded in an organic solvent, they are stained with an appropriate dye (for example, a basic dye) and washed with water. You can see that it is doing.

 In the present invention, the hydrophilic vinyl monomer means a compound having a compatible vinyl group in the molecular structure and an acidic group such as carboxylic acid or sulfonic acid, or a salt thereof, a hydroxyl group, an amide group, or the like. It refers to a monomer having a hydrophilic group.

 Specifically, acrylic acid monomers such as acrylic acid, sodium acrylate, aluminum acrylate, zinc acrylate, calcium acrylate, magnesium acrylate, etc .; MID-2-methyl sulfonic acid, methacrylic acid, aryl alcohol, sodium polysulfonate, acrylic acid mide, sodium bi'inolesulfonate, For example, sodium talylsulfonate, sodium styrenesulfonate, or the like can be used. These may be used alone or in combination of two or more.

 Among these, 2 — Akrilua Midor 2 — Methylproha. Sulfonic acid and / or its sodium salt, and vinyl-based monomer containing sulfonic acid and / or its salt in its molecular structure such as sodium arylsulfonate. I like it.

The reaction rate of the hydrophilic vinyl-based monomer with respect to the fiber structure is preferably 1% by weight or more and 20% by weight or less from the viewpoint of obtaining excellent moisture absorption while maintaining good texture of the fiber structure. 3 weight ⁰ ο or more 1 7 weight? . It is more preferable that It is more preferable that the weight is not less than 5 weights ¾ ⁰ ο and not more than 5 weights ^Ο ο. Here, the reaction rate means the ratio (weight ^Q. ) of the weight it added to the fiber structure by the graph polymerization, and 1%, [( After fiber ^ structure absolute weight)

(Absolute dry weight of fiber structure before graft polymerization)]. (Calculated from the absolute dry weight j before graft polymerization.)

The fiber structure of the present invention has an ffi degree of 30 and a humidity of 90 °. Moisture absorption MR 2 (° o) Te temperature 2 0, moisture absorption of the fiber creation in degrees 6 δ ° ο MR 1 (o 0 Δ MR force ¾ a value obtained by subtracting the re fibrous structure in <, F It is preferable to add the expression.

 -1. Δ M R≤ 1 4

 The absorption rate λ'1 R 1 (.ο) of the fibrous structure at a temperature of 20 V and a degree of 65 can be considered to be the hygroscopic property of clothes in the standard environment F. Yes, at a temperature of 3 () and a humidity of 90, the moisture absorption rate of the fibrous structure MR 2 ("ο can be considered as the moisture absorption property of the clothes after exercise.

 The △ MR of a textile structure composed of only cellulose fibers in which a hydrophilic vinyl monomer is not graft-polymerized is at most 4.

 On the other hand, since the fiber structure of the present invention is obtained by graft polymerization of a hydrophilic vinyl monomer, the MR is more than 4, which is larger than that of the conventional fiber structure consisting of only cellulose fibers.设 i L shows hygroscopicity.

In the present invention, KES (. Kawabata Evaluation System) measurement refers to KES as described in Kawabata Toshio, Textile Machinery Society ¾ (Fiber Engineering), vol. 26, No. 10, P72i P728 (1973). It measures the repulsive force at each curvature when a fiber structure is bent using a bending characteristic measuring machine (made by Kato Tec). The mean value of the repulsive force between the curvature ϋ.5 force, etc. 5 .5 is Β (unit: g · cm ² , · cm), and the vertical and horizontal two sides of the fiber structure the measurement was carried out for each direction, the average value B basis weight W "units of value and the fiber structure of the B:. those determining the ratio B z W with g / m ^2).

The male fiber structure of the present invention has a ratio B, W between the measured value of bending stiffness (B) and the basis weight (W) by KES (Kawabata Evaluation System) measurement of not less than 0.0001 and 0.0005. It must be:

 When the BW measured by the KES exceeds 0.005, the texture becomes hard and the quality deteriorates. It is preferred that this B z \ V be less than (). Ϋ () 1 and more preferably less than 0.03.

 Next, one embodiment of the method for producing a fiber structure of the present invention will be described.

 A fiber structure obtained by weaving or knitting into a woven, knitted or non-woven fabric made of cellulose fiber is subjected to a heat treatment after being impregnated with an aqueous solution containing a hydrophilic vinyl monomer and a polymerization initiator. The fiber structure of the present invention can be obtained by performing weight reduction processing before or after graft polymerization processing.

 As a method of impregnating a fibrous structure composed of cellulose fibers with an aqueous solution containing a hydrophilic vinyl monomer and a polymerization initiator, for example, a method of sifting for a fixed time or a method of padding can be adopted. The impregnation temperature is not particularly limited, and the impregnation can be performed at room temperature.

 In the present invention, a polymerization initiator generally used in radical polymerization is preferably used as the polymerization initiator. Specifically, peroxides such as ammonium persulfate and benzoyl peroxide, azo-based catalysts, cerium catalysts and the like are preferably used.

The concentration of the hydrophilic vinyl-based monomer in the aqueous solution containing the hydrophilic vinyl-based monomer and the polymerization initiator is not particularly limited, but from the viewpoint of efficiently performing the reaction, is preferably 0 wt ^Q ₀ or more 3 A concentration of 0 weight or less is preferred. 1 3 ¾ amount more than 7 wt ^D o verses in it and this is favored more or less, 1 5 weight ₀ to 2. 5-fold ¾ arbitrarily favored by it to have been al follows. The concentration of the polymerization initiator in the aqueous solution containing the hydrophilic vinyl monomer and the polymerization initiator is not particularly limited, but from the viewpoint of performing the reaction efficiently, 1% by weight based on the hydrophilic vinyl monomer. more than 5% by weight as in it is like following, 2 weight ¾ more than ■ 1 double fi ^Q o less it is more preferred arbitrariness.

Further, to suppress the strength property decrease of the fiber structure of cellulose fibers, also from the viewpoint to carry out the reaction efficiently, _P H of the aqueous solution containing the polymerization initiator剂hydrophilic vinyl-based monomer is 1 2 or less or more ΰ It is more preferable that あ る is 7 or more and 11 or less.

In the method for producing a fibrous structure according to the present invention, the force for performing the heat treatment after the impregnation treatment, Indispensable for performing the graft polymerization reaction. The heat treatment may be employed without particular limitation, such as a dry heat treatment and a ripening treatment.

 The degree of heat treatment for carrying out the graphitization is not particularly limited, and it is preferable to carry out the reaction at a temperature of not less than 80 and not more than 200 from the viewpoint of efficiently carrying out a gas reaction. Heat treatment can be performed in one or more stages. The heat treatment time is determined in consideration of the heat treatment temperature in consideration of the desired graph reaction rate, and is preferably 20 seconds or more and 5 minutes or less.

 In addition, in this graft polymerization process, after heat treatment, washing is performed to remove unreacted monomers attached to the fiber structure and polymers not graft-polymerized to cellulose. Is preferred. The washing method is not particularly limited, such as water washing and hot water washing. However, washing is preferably performed from the viewpoint of washing efficiency. In addition, if the reduction described later is performed after performing the graph addition, the reduction 1: the processing also performs the washing operation /!].

 It is necessary to reduce the weight in addition to the above polymerization. The term "weight reduction processing" as used herein refers to a treatment for decomposing and removing a part of the fibers constituting the fiber structure to reduce the weight thereof.

 As a method of reducing the weight of the cellulose fiber, it is preferable to use a treatment with a cellulolytic enzyme, such as treatment with a cellulolytic enzyme or hydrolysis with an acid. Cellulase-degrading enzymes include bacteria such as Tricoderma co, Fumicola 厲, Aspergillus As, Bacillus ス, and the like. These cellulolytic enzymes are commercially available and can be used as they are.

 In the present invention, the weight loss rate of the weight loss processing refers to the ratio of the parts decomposed and removed before and after the processing, and is specifically calculated from (weight loss / weight before processing>〗 100).

In the weight-reduction processing in the present invention, a fiber structure having an excellent texture can be obtained by applying a physical stimulus to the fiber structure, in particular. For example, using a liquid-flow dyeing machine or an airflow dyeing machine, a physical structure such as rubbing, hitting, or rubbing the fiber structure Reduces the amount of fiber in the fabric while giving a sting. Such a treatment is considered to give a soft texture to the fiber structure by forming a space between the fibers of the fiber structure. In addition, in order to increase the physical stimulation, it is necessary to ensure that the material is rich in irregularities such as fiber or ceramics while driving, and that it has a large frictional engagement (so that it comes into contact with the material). From this point of view, weight reduction processing uses ceramic nozzles in a liquid dyeing machine or an airflow dyeing machine, or a similar material is used for the passage of a fiber structure during high-speed running. It is more preferable to use a partition or to install a partition plate.

 In conventional weight reduction processing using a wire or the like, a soft texture cannot be obtained because there is little physical stimulus such as squeezing, tapping, and abrasion, and the B / W value described above is at most 0. Only a degree was obtained.

In fiber structure of this embodiment, from the viewpoint of keeping strength while imparting flexibility, cell opening one scan, is a reduction Y ratio of Satoshi維favored or 3 or 1 ϋ ^Q o or less arbitrarily.

 As a method of weight reduction, for example, the above-mentioned cellulose-degrading enzyme has a degree of 1 g / l or more and 3 () g. It is preferred to process at a temperature of

 In the present invention, the order of the graft polymerization process and the reduction process may be such that the weight reduction process is performed after the graft polymerization process or the weight reduction process may be performed first. When the reduction is performed after the gel addition, a larger inter-fiber space is generated, and the texture softening effect can be increased.

 Next, another embodiment of the fiber structure of the present invention is a fiber structure using a cellulose fiber and a polyester fiber, wherein a hydrophilic vinyl monomer is graft-polymerized on the cell mouth fiber. And the bending stiffness measured by KES (Kawabata Eva lua ti on System) (B and the basis weight (the ratio W of 'j is approximately. () () Ϋ1 or more ϋ. () Ϋ5 The fibrous structure is as follows: 0 is preferably 0.01 or less, and more preferably 3 or less.

This fiber structure has the same or better hygroscopicity as a fiber structure made of cellulose fibers, has a soft texture, and has a reduced shrinkage compared to a fiber structure made of only cellulose fibers. It has excellent characteristics. From this perspective The cellulose fiber content is 1 kg by weight. . Above 9 0 duplex;.. 1 ⁽ 'hereinafter, preferred Toka this is含冇rate of polyester textiles 9 () heavy ffi ⁰ o or 1 Y wt% or less arbitrarily rather then preferred over the content of the cellulose fibers 20 weight% Q or more and 80 weight < ^π or less, the content of polyester fiber is 80 weight% or more and 20 weight or less itt ⁰ o, and more preferably, the content of cellulose fiber is 3 0 — S: More than 7 o-ffi.a or less, the content of polyester fiber is 70 weight " ₀ or more 30 1: 虽%« ".

 In the present invention, a fiber made of a polyester polymer having a fiber forming property, such as polyethylene terephthalate, is used as the polyester fiber. The polyester polymer mentioned here includes not only a homopolymer but also a copolymer.

 A fiber oval product using cellulose fiber and polyester fiber is a yarn obtained by blending or knitting a polyester fiber and a cellulose fiber into a fabric, knitted fabric or non-woven fabric, or These sewing products are included. Among them, a woven fabric, a knitted fabric, or a sewn product thereof is a preferred form, and a woven fabric or the sewn product is a more preferred form.

The fibrous structure of the present invention in this embodiment comprises polyester fibers, and the hydrophilic vinyl monomer is grafted together with the cellulose fibers obtained by grafting as described above. Because of this, it is excellent in hygroscopicity. In addition, the fiber structure was obtained from the moisture absorption rate ViR 2 ') of the fibrous structure at a temperature of 3 ° C. and at a temperature of 9 ° C. from the ffi degree 20 ^: ' C, ffl degree 65 '. Moisture absorption MR 1 (expressed by subtracting ° o) △ -VI R force It is preferable to satisfy the following equation.

 0. 0 4 (1 0 0-X) Δ M R≤ 0 .1 4 x (1 0 0-x

Here, X represents the ratio (: weight) of the polyester fiber in the fiber structure. Further, the fibrous structure of this embodiment preferably has a shrinkage of 3 mm or less. More preferred arbitrariness or that contraction rate is less than or equal to 2 ⁿ o.

 This fibrous structure exhibits a high hygroscopic property because a hydrophilic vinyl monomer is graft-polymerized on a cellulose fiber, and a hydrophilic vinyl monomer is grafted on one hydrophobic polyester fiber. It does not polymerize and can maintain the shrink-proof properties inherent in polyester fibers. .

This fiber structure is composed of polyester fiber and cellulosic fiber. The product may be subjected to a weight reduction process as described above before or after the above-described graft polymerization process in which the product is subjected to an impregnation process of an aqueous solution containing a hydrophilic vinyl monomer and a polymerization initiator and then to a heat treatment. be able to.

 The male fiber structure obtained in this way has almost no loss in the high shrinkage resistance of the polyester fiber, and is obtained by using a conventional polyester fiber and cellulose fiber. It will be highly absorbent.

 The process for reducing the weight of the cell opening fiber is the same as described above. As the method for reducing the weight of the polyester fiber, a weight reducing process using an alkaline compound such as hydroxyl hydroxide can be used.

 For example, the fiber structure is immersed in an aqueous solution having a concentration of the cellulolytic enzyme of 1 g.i or more and 30 g / l or less and treated at a temperature of 30 or more and 90 or less. It is preferable. Alternatively, the concentration of the alkaline compound is 10 g / 1 or more and 300 g,! It is preferable that the fiber structure is immersed in the following aqueous solution and treated at a temperature of 5 CTC or more and 200 or less.

In the male fiber structure of this embodiment, from the viewpoint of maintaining the strength while imparting flexibility to the fiber structure, the weight loss rate of the cellulose fiber is 3 ⁽ 'o or more and 10 or less, weight loss of the polyester fiber). The rate is preferably 3% or more and 20 or less.

Next, still another embodiment of the fiber structure of the present invention is a fiber drawing made of cellulose fibers, wherein the washing i shrinkage is 3 ⁿ . And KES (awabata Evaluation System; iJ (ij), the ratio of the measured bending stiffness (B) to the basis weight (W), B, W, is greater than or equal to 0. It is a fibrous structure 8 / \\ 'is preferably 0. () ϋ 4 or less, and ϋ. 0 () 3 or more F is more preferable.

 The fiber structure of this embodiment is a fiber structure having shape stability and a soft texture.

 The washing shrinkage ratio as used in the present invention is a value measured by the method according to j IS — L1042 or a method according to JS — L] 0.! 2 which can obtain similar results. It refers to the value measured by a method that changes the washing test machine, processing conditions, etc.

The fiber shrinkage of this embodiment must have a washing shrinkage of 3 or more. When the washing shrinkage exceeds 3%, the form stability becomes poor. This washing shrinkage rate is 2 or less. It is preferably below, and more preferably less than or equal to i¾.

 The fibrous structure of this embodiment includes a so-called form stabilization method of preventing the fibrous structure from wrinkling after washing by cross-linking the cellulose that forms the cellulose fibers, and a process for reducing the weight of the cellulose fiber. And is obtained by applying Methods for cross-linking cellulose include a method of treating a fibrous structure with a cellulose-reactive resin, a method of exposing a fibrous structure to formaldehyde, and ripening in the presence of a catalyst. No.

 Here, examples of the cellulose-reactive resin include dimethylol ethylene urea, dimethylol perone, dimethylol triazone, dimethylol propylene urea, and dimethylol hydroquinethylene urea. Further, as a method for treating a fibrous structure with a cellulose-reactive resin, for example, after applying an aqueous solution of the resin together with a catalyst to the fibrous structure by padding, the resin solution is subjected to at least 80 "C and at least 200" C. "A method of heat treatment at a temperature of not more than C can be preferably employed. As the catalyst, an inorganic gold salt such as magnesium chloride can be used.

 On the other hand, formaldehyde vapor can be generated by ripening an aqueous solution of formaldehyde or paraformaldehyde. The heat treatment after exposing the fibrous structure to the formaldehyde vapor is preferably performed at a temperature of at least 60 and a temperature of at most 0, and an acidic substance such as sulfuric acid or sulfuric acid is used as a catalyst in this case. Can be used.

 Combing with protein u [t, resin and formaldehyde can be detected using a variety of commonly used analytical methods, such as liquid chromatography \ MR.

 Weight reduction processing is performed in addition to morphological stability processing, and the above-described weight reduction processing method can be used for this weight reduction processing.

 From the viewpoint of maintaining the strength while imparting flexibility to the fiber structure, the weight loss rate of the cellulose fiber is preferably 3 to 10%.

As a method of weight reduction, for example, the fiber structure is immersed in an aqueous solution with an enzyme concentration of】 g) or more and 30 g or 1 1 or less and treated at a temperature of 3 () or more and 90 or less. do it. -In the present invention, the number of celluloses is reduced and reduced. The weight loss processing may be performed after applying the weight loss, or conversely, the weight reduction JT- may be performed first. The advantage of applying the shape-stabilizing process first is that a large inter-fiber gap is generated due to the reduction, and the texture softening effect is increased. Conversely, since the inter-fiber voids generated when the weight reduction processing is performed first are reduced during the form stabilization processing, the force for softening the texture is reduced, and the form stability effect is increased. What is necessary is just to select suitably according to the target characteristic. In addition, morphological stabilization, in which the fiber structure is exposed to formaldehyde vapor and heat-treated in the presence of a catalyst, is generally performed on the product after it has been manufactured. It is desirable to reduce the increase in the amount of power generated from the sewn fabric instead of the ¾ after the s. The reason for this is that it is difficult to treat each part of the sewn product uniformly in the post-sewn product processing, and it is a problem that the quality of the product is severely impaired or locally reduced in strength. It is. In addition, it is difficult to perform morphological stabilization and reduction processing on sewn products because special equipment is required. In the present invention, such a problem can be avoided by performing the weight reduction processing in a state of the fiber structure before sewing.

 Still another embodiment of the fiber structure of the present invention is a fibrous structure comprising cellulose fibers and polyester fibers, wherein the fiber has a washing shrinkage of 2% or less and a K E

S (aa ba ta E va l ua ti on Sy 'st cni) The ratio of the measured bending stiffness (B) to the basis weight (\\') B, W is 0.0 001 or more and 0.0 ( ) The curtain structure is 5 or less. 13 / W force, preferably greater than 0.000 i, more preferably greater than (). () () 3.

 This fibrous structure has shape stability, has a soft hand, and suppresses shrinkage as compared with a structure composed of only cellulose fibers, and has excellent strength characteristics.

 The fibrous structure includes a yarn obtained by blending or mixing polyester fiber and cellulose fiber, woven or knitted into a woven fabric, a knitted fabric, or a nonwoven fabric, or a sewn product thereof.

Since this fibrous structure contains polyester fiber, shrinkage is suppressed as compared to that made of only cellulose fiber, it has excellent morphological stability, and it has strength characteristics even when weight reduction processing is performed. It will be excellent. From this viewpoint, cellulose fiber The content of fiber is 10 weight. . Above 9 0 wt or less, arbitrary preferred that the content of the Po Li ester fibers 9 is 0 wt ⁰ o or 1 0 wt ⁰ ₀ below. More preferably, the content of the cellulose fiber is 20% by weight or more and 80% by weight or less, and the content of the polyester fiber is 80% by weight or more and 20% by weight. And more preferably, the content of cellulose fibers is 30% by weight. . More than 70% by weight Qo, polyester fiber content is 70% by weight Q. Hereafter, it is less than h30 ffi ° ₀ .

It is necessary that the washing / shrinkage ratio of the fibrous structure of this embodiment is 2 or less. If the washing shrinkage exceeds 2%, the form stability becomes poor. It is preferable that the washing shrinkage ratio is ^1οο “, more preferably () ^.5 ° ο or less.

 This fiber structure can be obtained by subjecting a fiber structure made of cell opening fibers and polyester fibers to the above-mentioned form stabilization processing and reduction processing.

 The method of reducing the weight of cellulosic fiber is the same as described above. As the method of reducing the weight of polyester fiber, a method of reducing the weight with an alkali compound such as sodium hydroxide can be used.

 The weight reduction method is, for example, immersing the fibrous structure in an aqueous solution with a concentration of the cellulolytic enzyme of 1 g / l to 30 g / l and treating at a temperature of 30 to 90 ° C. It is preferable to do so. Alternatively, the male compound is immersed in a solution in which the concentration of the alkaline compound is 1 () g 1 or more and 300 or less, and the treatment is performed at a temperature of 50 or less. I prefer to do that.

 From the viewpoint of maintaining the strength while imparting flexibility to the fiber structure, the weight loss rate of cellulose fiber is 3 or more and 1 () ¾ or less, and the weight loss rate of polyester fiber is 3 or more and 20 °. ο The following is preferred.

 The rate of weight loss during weight loss refers to the proportion of the parts that have been decomposed and removed before and after weight loss, and is specifically calculated from (weight loss, weight before processing)> Ι ϋ Ο.

The order of the treatment of the cellulose crosslinking reaction and the weight reduction processing may be such that the crosslinking processing is performed and then the reduction processing is performed, or conversely, the weight reduction processing may be performed first. For the same reason as described above, form stable processing, in which the fibrous structure is exposed to formaldehyde vapor and heat-treated in the presence of a catalyst, is generally performed on the sewn product. In many cases, the mass processing in the present invention is not a product after sewing but a fiber before sewing. It is desirable to do this.

 Example

 Hereinafter, the present invention will be described more specifically with reference to examples. In addition, each characteristic m in the examples was obtained by the following jjίΐ.

 (1) Moisture absorption rate

The moisture absorption rate is determined by the weight of the fiber structure when it is absolutely dried, and in a constant temperature and humidity chamber at a temperature of 20 °, a temperature of 6 ° ^π ο or a temperature of 3 °, and a humidity of 9 °. From the change in weight with the weight after being left unattended for 2 to 1 hour, the following equation was used.

 Moisture absorption (".) = [(Weight of fiber fabric after standing at constant temperature and humidity)-(absolute dry weight of fiber structure) 100

The temperature was determined by the above equation, and the temperature was 20 degrees and the temperature was ^{65 u} . Under the conditions of moisture absorption iVI R 1, temperature 30 and humidity 90. . AMR was calculated from the moisture absorption rate MR2 under the following conditions by the following formula.

 △ M R M R 2 1 R 1

 Here, the larger the ΔMR, the higher the hygroscopicity and the better the comfort.

 (2) Reaction rate

 The reaction rate was calculated from the absolute dry weight of the fibrous structure before performing the graft polymerization and the absolute dry weight after performing the graft polymerization according to the following equation.

Reaction rate. ₀ = 1 0 0 [(absolute dry weight of fiber structure after graft polymerization) 1 (absolute dry weight of fiber structure before graft polymerization)] / (fiber before graft polymerization) Absolute dry weight of structure)

 (3) Weight loss rate

 The weight loss rate was calculated from the absolute dry weight of the fiber structure before the weight reduction processing and the absolute dry weight of the fiber structure after the processing, using the following formula.

 Weight loss rate-(absolute dry weight of processed fibrous structure-absolute dryness of fibrous structure after processing m>, I: processed liij; dry weight of fiber structure)-1 ϋ 0

 () Β / \ V

KES f ka abata Evaluation System) The ratio B.W between the average value B (unit: g · cm ² , m ′;) and the fiber attached to the structure (unit: m ² ) was measured.

 (5) Washing shrinkage

 The measurement of the washing shrinkage rate was performed using a household washing machine under the following processing conditions so as to obtain the same result as the washing shrinkage rate test method described in JIS-104.

Three test pieces of about 5 () c πι, about 5 ϋcm were collected, and each of them was marked with a height of 300 mm at a distance of 15 O mm fli] at each of three places. Next house赶用washing machine (Toshiba VH 1 I 5 ϋ-shaped detergent "Zab" ingredients Kao Corporation registered trademark) 0. Put including liquid 2 5 liters in ^ of the 2 ^{q Q,} the test piece After adjusting the weight so that the combined weight of the cloth and the additional cloth was about 500 g, the clothes were washed at 40 ° C for 25 minutes. Rinsing was further performed for 40 minutes at 40 ° C, and dehydration was performed with a dehydrator. Thereafter, the test piece was taken out without squeezing, sandwiched between dried filter papers, lightly dehydrated, and naturally dried on a horizontal wire mesh. Finally, the test piece was placed on a flat table to remove unnatural wrinkles and tension, and the length of each horizontal stamp was measured. The shrinkage was calculated by the following formula, and was expressed as the average value of three pieces each.

 Shrinkage rate (..) = (3 0 0-L) / 3 0 0> 1 ϋ 0

 Here, “shi” represents the average value of the length between the marks of the vertical or horizontal marks after processing (mm). Example 1

Cotton fabric with shrinking, white processing (use of yarn: warp 15th, weft-i5th, plain weave, veil density: yarn 115, inch> 7 6; i nc: h, with 5: j] () g .. m ^2), 2 - Accession Rirua Mi de - 2 - 2 0% methylpropane sulfonic acid, 0 persulfate Anmoniu arm 6 ° o (monomer ratio 3 ^0).. An aqueous solution containing the solution at a concentration of 1 was applied by padding. The squeezing rate was 9 (). The cotton fabric was then heat treated at 160 for 3 minutes. After the heat treatment, washing was performed with six hot waters. Measurements Then the value of the reaction rate at this after the above method was found to be 1 6 ⁰ o.

 Thereafter, the cotton fabric was immersed in a treatment solution containing 5 g of cellulolytic enzyme (Celsoft, manufactured by Novo Nordisk) at a concentration of 1 and treated at 60 ° C. for 1 hour. As a result, the weight of the fabric was reduced by 5.2% compared to the fabric before the enzyme treatment.

After the polymerization process and the weight reduction process, dyeing and finishing are performed in the usual way. Then, when each characteristic value is determined by the above method, AMR = 12.0%, B is () .3339 g · cm ² / cm, and W is 1 21 g / m ² . Yes, 13, 'W was 0.02

 On the other hand, B of the woven fabric, which has not been subjected to the grafting process and the weight-reduction process, has just been scoured and bleached, is ϋ 880 g, cm (: m, which is 1 1 () m '. , Β., W were ϋ. Ϋ 0 80.

 Example 2

Cotton fabric with tanning and white treatment (yarn use: warp 15th, weft 15th, plain weave, weave density: warp 115 / 'inch, weft 76 / inch, basis weight: 110g / m ² ) was immersed in a treatment solution containing cellulose-degrading enzyme (Celsoft L, manufactured by Novo Nordisk) at a concentration of 5 H, i, and treated with 60 at 1 hour R5]. As a result, the weight of the fabric was reduced by 6.5 mm compared to the cotton fabric before the enzyme treatment.

Thereafter, padding the cotton fabric with an aqueous solution containing 2-acrylamide 2-methylpro / sulfonic acid at a concentration of about 2.6% (monomer ratio: 3.20%) at 20 ° ₀ ammonium persulfate. Granted by The squeezing rate was 90%. The cotton fabric was then heat-treated for 3 minutes at 16 mm. After the heat treatment, the substrate was washed with hot water. After that, the reaction rate was measured by my own method and found to be 12%.

After reduction processing and Bok polymerization process above graph, dyeing, at row one in the usual manner a finishing treatment, with △ MR = 8. 8, B is ^{0. 3 4 6 g · cm 2} ., In cm, W Was 1 15 gzm ² , and B and \ V were about 0.030.

 Comparative Example 1

Cotton fabric with scouring and bleaching treatment [Thread usage: warp-15th, weft 15th, plain weave, weaving density: warp 115 / inch Weft 76, inch. Weight: 丄 1 ϋ g, In m ² ), add 20—acrylamide 2—methylpropanesulfonic acid. . , An aqueous solution containing a concentration of the persulfate Anmoniu厶0.6% (monomer ratio 3 ⁰ o) was applied by padding. The squeezing rate is 9 (). . Met. The cotton fabric was then heat treated at 160 for 3 minutes. After the heat treatment, 60 minutes of hot water was used for washing. After that, when the reaction rate was measured by the above method, the value was 16 ^は . Met.

After that, when each characteristic value is determined by the above method, AMR = i = 5 and B is]. At 177 g · cmcm, W was 128 g, m ² , and 13 \ V was ϋ. () 092. In this case, a high degree of absorption was obtained, but the flexibility was poor.

 Comparative Example 2

Cotton fabric with scouring and bleaching treatment (: Thread use: warp 45th, yarn 45th, plain weave, weaving density: warp 115, inch 緯 mech 76 / inch, weight: I1 0 g, m ² ) was immersed in a treatment solution containing cellulase-degrading enzyme (self-softened, manufactured by Novo Nordisc) at a concentration of 5 g / 1, and treated at 60 ° C. for 1 hour. As a result, the weight of the woven fabric was reduced by 7.5 mm compared to the cotton fabric before the enzyme treatment.

After that, when each characteristic value is measured by the above method, AMR = 3.i ° ₀ , B is 0.275 gcm ² / cm, W is 102 g / m ² , 13 '\ V was 0.0ϋ27. In this treatment, the flexibility was inferior to the obtained force and hygroscopicity.

 Example 3 ~ ΰ

 The procedure was the same as in Example 1 except that the type of hydrophilic vinyl monomer was changed. Table 1 shows the results. All had high hygroscopicity and flexibility.

 Examples 7 to 10

 The procedure was performed in the same manner as in Example I, except that the pH of the aqueous solution containing the hydrophilic vinyl monomer and the initiator was changed. Table 2 shows the results. All had high moisture absorption and flexibility.

 Examples 11 to 4

 The procedure was performed in the same manner as in Example 1 except that the concentration of the hydrophilic vinyl monomer in the aqueous solution was changed. Table 3 shows the results. All had high hygroscopicity and flexibility. Examples 15 to 18

 The procedure was performed in the same manner as in Example 1 except that the concentration of the initiator with respect to the hydrophilic vinyl monomer was changed. Table 4 shows the results. All had high hygroscopicity and flexibility. Example i 9 to 22

 The same operation as in Example 1 was performed except that the heat treatment temperature was changed. The results are shown in Table 5. All had high hygroscopicity and flexibility.

 Example 23

1 5th Cotton / Polyester Blended Yarn (Mixing Ratio: Cotton 55 Weight Polyester (0.17 tex, fiber length 10 mm)-15 weight ^η ο) to warp and weft! ], Refined and bleached plain woven fabric (weaving density: 115, weft, 76 / inch, basis weight: 1] 0 g, m ² ), and 2-acrylyl Tyl propane sulfonic acid

An aqueous solution containing 20% ammonium persulfate at a concentration of about 0.6 ° (monomer ratio of 3 ° ⁽⁾ ) was applied by hardening. The squeezing rate was 9ϋ ° ₀ . The cotton fabric was then heat treated at 160 ° C for 3 minutes. After the heat treatment, cleaning was performed at 60 ° C. After that, when the reaction rate was measured by the above method, the value was 8.

 Thereafter, the cotton fabric was immersed in a treatment solution containing 5 g I of cell mouth degrading enzyme (cell softened, manufactured by Novo Nordisc) and treated (at 30 ° C. for 2 hours). The weight of the fabric was reduced by 8. () に compared to the fabric before the enzyme treatment.

 Above ;! After the graft polymerization process and weight reduction process, dyeing and finishing were performed in the usual way, and after measuring each characteristic value by the above method, 方法 Κ = ΰ. 5%, and Β was 0.

300 g-cm ² , cm, W is 109 g / m ² , β / \ 'V is () · 0 28

On the other hand, B of the woven fabric immediately after scouring and bleaching treatment, which has not been subjected to the graft polymerization processing and weight reduction processing, is ϋ0.9 9 g / cm ² / cm, and W is 110 gm ^: B and YV were ϋ. () Ϋ 83.

 Example 2 4

5th cotton, polyester blended yarn Mixing ratio: cotton 5 5 weight. Q Polyester (0.17 tex, fiber length 40 mm) 15 weight ^D. ) Is used for warp and weft, and scoured and bleached to give a cellulose fabric (weaving density: 115 X W 76, inch. Basis: 11 Og / m ² ) The enzyme (Celsoft, Novonorudisk) was immersed in a treatment solution containing 5 g./1 at a concentration of 60 and treated at 60 for 2 hours. As a result, the weight was reduced by 9.5 compared to the fabric before the enzyme treatment.

Then, an aqueous solution containing 2-acrylic acid 2-methylpropanesulfonic acid at a concentration of 20 ° o and ammonium persulfate at a concentration of 6ϋ (monomer ratio 3 ° o) was added to the fabric by budging. Granted. The squeezing rate was 90. The fabric was then heat treated at 160 for 3 minutes. After the heat treatment, washing was performed with hot water at 60 ° C. After that, when the reaction rate was measured by the above method, the value was 7%. After reduction processing and Bok polymerization process above graph, dyeing, row Tsutatoko filtration Workup in the usual way, with ^{IR = 1. 5 0 ό,} B is 0. 3 2 () β · cm 2 / cm , \\ 'was 1 () 7 g / m ² , and B and W were ϋ .003 ().

 Project 2 5

 Instead of treating with cellulose degrading enzyme in Example 23, the woven fabric was immersed in an aqueous solution containing sodium hydroxide at a concentration of 5/1, and treated with 95 for 1 hour. At this time, the ft reduction rate was 15.2%.

Then, when each characteristic value is measured by the above method, 2. MR = 6.9, B is 0.2 ■ 12 g · cm ^: -cm, W is 101 g and m ² , 13, W was about 0.02.

 Comparative Example 3

15 Cotton, polyester spinning (mixing ratio: cotton 5 δ weight). Polyester (0.17 tex, fiber length 40 mm) 15 weight ^u . Is used for warp and weft, and scouring is performed. , plain weave subjected to bleaching treatment (weaving density: after 1 1 5 weft 7 six / inch, with eyes:] 1 0 g 'm ^2), the 2 - § click Li Norea Mi de one 2 - main Chirupuro Bruno An aqueous solution containing 20% sulfonic acid and 0.6% ammonium persulfate (monomer ratio: 3 ^(> )) was applied by padding. The squeezing rate was 90%. The fabric was then heat-treated for 3 minutes at 16 ° C. After the heat treatment, it was washed with 60 pieces of hot water, and the reflex was measured by the above method to find that the value was 8 ^η .

Thereafter, when measuring the characteristic values in the above manner, in lM R = i. 2, B is 1. 0 9 3 g · cm 2 / cm, W is ^{i 1 9 g / m Σ,} B κW was 0.0 () 92. In this case, a high degree of hygroscopicity was obtained, but the flexibility was poor.

 Comparative Example 1

4 5th cotton, ^polyester blended yarn (mixing rate: ^55% cotton ^綿) , 15% polyester (0.17 tex, male length 10mm) used for warp and weft Tanashi, scouring and bleaching treatment, weave a plain woven fabric (weaving density: 1), 5 wraps, 76 pieces .. inch. Weight: 11 ϋg, m ² ) with cellulose degrading enzyme (cell softening, Bono immersed Rudy disk Co.) to the processing solution at a concentration of 1, 6 0 for 2 h at hand. this result, compared to the fabric prior to enzyme treatment '蛩decreased 9. 5 ^D o . Thereafter, when the characteristic values in the manner described above i! W is constant, at. MR = 2. 8 ¾, B 0. In ^{2 3 9 g · cm 2 cm} , W is 1 0 0 g / m ² Yes, B / \ V became ϋ.0.024. In the second treatment, flexibility was obtained, but poor hygroscopicity.

 Comparative Example 5

 Instead of treating with the cellulose degrading enzyme in Comparative Example 4, the woven fabric was immersed in an aqueous solution containing sodium hydroxide at a concentration of 5 g i, and treated with 95 for 1 hour. The weight loss rate at this time is 1-1.5. o

Thereafter, when measuring the characteristic values in the above manner, the ^ Vi R = 3. 4, B is 0. 2 ϋ 7 g · cm 2, cm, W is 9 4 g / m ^2, B , 'W is now 0.02 2. This treatment provided flexibility, but was inferior in hygroscopicity.

 Example 2 ΰ to 28

 The same procedure was performed as in Example 23 except that the mixing ratio of the polyester fibers was changed. Table 6 shows the results. All had excellent hygroscopicity and flexibility.

 Example 2 9 to 3 2

 The procedure was performed in the same manner as in Example 23 except that the type of the hydrophilic vinyl monomer was changed. Table 7 shows the results. All had excellent hygroscopicity and flexibility.

 Example 3 3 to 3 (3

 Example 23 was performed in the same manner as in Example 23 except that the weight 1 of the aqueous solution containing the hydrophilic vinyl monomer and the initiator was changed. Table 8 shows the results. All had excellent moisture absorption and flexibility.

 Example 37 to 40

 / In the same manner as in Example 23, except that the concentration of the hydrophilic vinyl monomer in the solution was changed. Table 9 shows the results. All had excellent hygroscopicity and flexibility. Example 11 1 to 4 4

 Example 23 was carried out in the same manner as in Example 23 except that the concentration of initiator (II) for the hydrophilic vinyl monomer was changed. The results are shown in Table 10. All had excellent hygroscopicity and flexibility.

 Example 45 to 18

The same procedure as in Example 23 was carried out except that the heat treatment temperature was changed. Table 1] Shown in All had excellent hygroscopicity and flexibility.

 Example 19

Cotton fabric with scouring and bleaching treatment (Thread usage: warp! 5th, weft 15th, plain weave, weaving density: warp 1 i5 / inch weft 76 / inch, weight: 110 g the kappa m ^2), di-methylcarbamoyl port one Ruhi Dorokishechiren urea 6 ¾, a as the chloride catalyst Maguneshiumu 6 hydrate thereof 2 ^0. The aqueous solution containing was applied by padding. The squeezing rate was 90. The cotton fabric was then dried at 100 ° C. for 3 minutes and heat-treated at 160 ° C. for 1 minute.

 Thereafter, the cotton fabric was immersed in a treatment solution containing 5 g of cellulose decomposing enzyme (Celsoft, manufactured by Novo Nordisk) at a concentration of 1 and treated with 60 hours for 60 hours. As a result, the weight of the fabric was reduced by 5.2 mm compared to the cotton fabric before the enzyme treatment.

After these two treatments, the color and finishing treatments are performed in the usual way, and then the shrinkage and bending stiffness of the animal are determined by the above method. 0, horizontal 0.8 ^u . Where Β was 0.270 g′cmcm, W was 104 g / m ² , and B was W. 0 () 0 2 ΰ.

On the other hand, the washing shrinkage of the cotton fabric immediately after scouring and bleaching treatment, which has not been subjected to these two treatments, is 5.5 5, and the Β is 0.9 () 2 g. In 'cm ² / cm, \\' was 110 g and m ² , and B and W were 0 · 0 () 82.

 Example 5 0

Cotton fabric with scouring and bleaching treatment (yarn use: warp i5th, weft 45th, plain weave, weaving density: warp 1) 5 pcs, inch weft 76 / inch, basis weight: 110 _g , m ² ) was immersed in a treatment solution containing cellulase-degrading enzyme (Celsoft L, manufactured by Novo Nordisk) at a concentration of 5 g /], and treated at 60 ° C. for 1 hour. As a result, the mass of the fabric was reduced by 7.5 compared to the cotton fabric before the enzyme treatment.

Thereafter, the cotton fabric in Jimechiroruhi mud carboxymethyl ethyleneurea 6 _0, catalyst and to an aqueous solution containing 2% chloride Maguneshiumu hexahydrate was applied by padding. The squeezing rate was 90 " _0. The cotton fabric was dried at 100 ° C for 3 minutes, and then heat-treated at 160 ° C for 1 minute.

After these two treatments, dyeing and finishing were carried out in the usual way. 濯shrinkage, vertical 0. 8 ¾, beside ϋ. 7%, Β is ϋ. 3 0 5 g 'in CMCM. W is ^{1 0 2 g / m 2,} B, W is (). 0 0.30.

 Example 5 1

Refined and bleached cotton fabric (use of yarn: warp 45th, weft 15th, plain weave, weaving density: warp 1 i5 / inch> weft 76 / inch. Weight: 1 1 0 g, m ² ) was exposed to formaldehyde vapor generated from paraformaldehyde in a closed reactor for 5 minutes. The reactor temperature during the run was 60 ° C. Next, sulfuric acid gas was flowed into the reactor to remove the woven fabric, and then the temperature of the reactor was raised to 160 and treated for 3 minutes.

 Thereafter, this cotton fabric was immersed in a treatment solution containing cellulose degrading enzyme (Celsoft, manufactured by Novo Nordisk) at a concentration of 5 g / 1, and treated at 60 for 1 hour. As a result, the weight of the fabric was reduced by 6.5 mm compared to the cotton fabric before the enzyme treatment.

After these two treatments, dyeing and finishing are carried out in the usual manner, and then the washing shrinkage and bending stiffness are determined by the above-mentioned methods. 9, 9 was 0.237 g · cm ² / cm, VV was 1.3 g, m ² , and B / W was 0.023.

 Example 5 2

Cotton fabric with scouring and bleaching treatment (yarn use: warp 45th, weft 45th, plain weave, weaving density: warp 115 / inch weft 76, ihhh, weight: 110g ,, 'm ² ) was crushed in a treatment solution containing 5 g of cellulase-degrading enzyme (Celsoft, Novo Nordisk) at a concentration of I and treated at 60 ° C for 1 hour. As a result, the weight of the fabric was reduced by 7.3 compared to the cotton fabric before the enzyme treatment.

 The cotton fabric was then introduced into a closed reactor and exposed to formaldehyde vapor generated from paraformaldehyde for 5 minutes. The reactor temperature during the run was 60. Next, sulfuric acid gas was flowed into the reactor to expose the cloth, and then the temperature of the reactor was raised to 0 ° C. and subjected to a treatment for 3 minutes.

After these two treatments, dyeing and finishing are carried out in the usual way, and then the washing shrinkage and bending stiffness are measured by the above method. The washing shrinkage is 0.8 Q'o, 0. in 8 ^0, B is 0 ^{in. 2 8 6 g 'cm 2} cm, W is 1 0 2 g, m ^2, and B and \ V are (J. 0 () 28.

 Comparative Example 6

Refined, white-treated cotton fabric (use of yarn: warp-15th, weft 15th, plain weave, weave density: 115 warp, inch> about 76 inch, weight per unit: 110 g, At m =), dimethylol hydroquinone ethylene urea was added to 6 ⁽⁾ ₀ , and magnesium chloride ^{hexahydrate was} used as a catalyst for 2 ^ml . The aqueous solution containing was applied by padding. Squeezed rate was 9 0 ^Q o. The cotton fabric was dried at 100 ° C for 3 minutes and then heat-treated at 160 ° C for 1 minute.

After that, when the washing shrinkage and bending stiffness are measured, the washing shrinkage is 0.9 mm, sideways 0.9 "0, and B is 0.957 g · cm ² , 'cm. \ 'V is ^{1 1 0 g / m 2,} β., \\' was ϋ. 0 0 8 7. in this case, the thickness but it was obtained form stability Ru poor flexibility Was.

 Comparative Example 7

Refined, white-treated cotton fabric (use of yarn: warp 45th, weft 45th, plain weave, weaving density: warp 115, inch> weft 76, inch, basis weight: 1 丄 ϋ _g , m ² ) were exposed to formaldehyde vapor generated from paraformaldehyde in a closed reactor for 5 minutes. The reactor temperature during the exposure was 60. Next, sulfurous acid gas was introduced into the reactor to remove the cloth, and then the temperature of the reactor was raised to> 60 ° C. and the treatment was performed for 3 minutes.

Thereafter, when the washing shrinkage and the bending stiffness were measured, the washing shrinkage was 1. 1 « ₀ , よ^1.0 1 .. Where Β was 0.913 cm ² , cm, W was 1 1 () g, m ² , and B, \ ΥIt ΰ. In this case, morphological stability was obtained but flexibility was poor.

 Comparative Example 8

Refined and bleached cotton fabric (yarn use: warp 45th, weft '15th, plain weave, weaving density: 115, inch weft 76, inch, basis weight: 110g, _m ) was immersed in a treatment solution containing 5 g 1 of cellulase-degrading enzyme (cellulosic, manufactured by Novo Nordisk), and subjected to 60 hours. As a result, the weight of the overflow was 7.5 compared to the cotton fabric before the enzyme treatment. '. Diminished. After this, and to measure the bending rigidity and washing shrinkage, washing shrinkage, vertical 5. 5 ° o. Son ^5. 3 Ο in ο, B in ϋ. 2 7 5 g · cm 2, cm, W was 102 g, m ² , and B / W was 0.0ϋ27. In this case, flexibility was obtained but shape stability was poor.

 Example 5 3 to 5 6

 The procedure was the same as in Example 49 except that the type of the cellulose-reactive resin was changed. Table 12 shows the results. All had excellent morphological stability and flexibility.

 Example 5 7-6 0

 The same operation as in Example 49 was performed except that the drying temperature and the heat treatment temperature were changed. Table 13 shows the results. All had excellent morphological stability and flexibility.

 Example 6 1 to 6 3

 The operation was performed in the same manner as in Example 51, except that the temperature of the formaldehyde air and the processing temperature were changed. Table 11 shows the results. All had high form stability and flexibility.

 Example 6 4

4 5th cotton polyester blended yarn (mixing ratio:. Cotton 5 5 wt ⁰ ./ Po Riesuteru ',' 0 1 7 TEC scan, fiber length 4 0 mm) 1 5 wt ^{ϋ ο} :: 'warp and weft The scoured and bleached plain woven fabric (weaving density: 115 Λ latitude 76, inch, basis weight: 110 g, m ² ) and dimethylol hydroxyxylene urea in 6 _"0, the Maguneshiumu chloride hexahydrate as a catalyst 2 ⁽ '. an aqueous solution containing imparted by padding. teeth Helsingborg rate was 9 0. then 3 minutes question drying the fabric in 1 0 0 hand After that, heat treatment was performed at 160 ° C. for 1 minute.

 Thereafter, the woven fabric was immersed in a treatment solution containing 5 g 1 of cellulolytic enzyme (Celsoft, manufactured by Novo Nordisc: ') and treated with 6 () for 2 hours. As a result, the weight was reduced by 10.2% compared to the fabric before the enzyme treatment.

After these two treatments, the dyeing and finishing treatments are performed in the usual manner, and then the washing shrinkage and bending stiffness are determined by the above-mentioned methods. The washing shrinkage is only 0.5 mm and the width is 0.4 mm. . . Where Β was ϋ .277 κ ′ cm ² , cm, W was 9.9 g, rn ² , and B, W li 0. Ϋ ϋ28. On the other hand, these two processing has not been performed, scouring, washing shrinkage of woven material immediately after the ¾ white processing, vertical 4. 5 ^u o, horizontal and 1 ^u o, B is 0.9 0 In 2 _g.cm 2, _c , \ ′ was 1 1 () κ.m ² , and B, · W was 0 · 0.082.

 Example 6 5

4 5th cotton / polyester blend yarn (mixing rate: cotton 55-E amount ^u . Polyester ((). 17 tex, fiber length 10 mm li 15 weight ° ο), used for warp and weft , Β-kneaded, drift-treated plain woven fabric Woven density: warp 1 15> weft 76 inch, basis weight: 110 g / m ³ ) and cellulose degrading enzyme (cell softening, Novo nordisk) Was immersed in a treatment solution containing 1 at a concentration of 1 and treated with 6 (TC for 2 hours.) As a result, the weight was reduced by 11.5 compared to the fabric before the enzyme treatment.

 Thereafter, an aqueous solution containing 6% of dimethylol hydroxyethylene urea and 2% of magnesium chloride hexahydrate as a catalyst was applied to the second fabric by padding. The squeezing rate was 90 to 0. This fabric was dried at C () 0 C for 3 minutes and then heat-treated at 160 ° C. for 1 minute.

After these two treatments, the dyeing and finishing treatments are carried out in the usual way, with a wash shrinkage of just 0.4 ¾, horizontal ϋ.3? 'Ό and β of ϋ0.292 gcm. ² / m, W was 97 g, m ² , and B / \ V was 0.030.

 Example 6 6

J 5th cotton / polyester blended yarn (combination rate: 55% cotton amount. Polyester (0.17 tex, fiber length 0.4 mm)) 15 weights are added to warp and weft, and refined. A bleached plain woven fabric (woven density: warp: 15 ゝ latitude 7 ΰ / inch, weight: 110 m ² ) was converted from paraformaldehyde in a closed reactor to formaldehyde. The reactor was exposed to steam for 5 minutes and the temperature of the reactor was 60. Next, sulfur dioxide gas was flowed into the reactor to remove the cloth, and then the temperature of the reactor was increased. Was raised to i 60 and treated for 3 minutes.

 Thereafter, the woven fabric was immersed in a treatment solution containing 5 g of cellulolytic enzyme (Celsoft, manufactured by Novonoldisk) at a concentration of 1 and treated at 60 ° C. for 2 hours. Weight decreased by 10.5 0>.

After these two treatments, dyeing and finishing are carried out in the usual way, If you则定the bending rigidity and washing shrinkage in the manner of, washing shrinkage, in vertical 0.5, good this _0. 4 o 0, B is 0. 2 4 6 g · cm 2, the teeth 'in m , W was 98 g, m ^: , and B, W were ϋ. () 0 25.

 Example 6 7

I 5th cotton, polyester blend yarn (mixing rate: 55 ffi cotton .. Polyester (0.17 tex, fiber length 40 mm 45 wt ^B o) is used for warp and weft. , scouring, plain weave fabric which has been subjected to bleaching treatment (Omitsu ^: 1 1 5 weft 7 six i nch, with ^{eyes:! i 0 g / m 2} ) , and cell opening and one scan-degrading enzyme (Serusofu door, Nobono Rudisk Co., Ltd.) was immersed in a treatment solution containing 5k1 and treated at 6ϋ for 2 hours. As a result, the weight was reduced by 11.5¾ compared to the fabric before the enzyme treatment. .

 The fabric was then introduced into a sealed reactor and exposed to formaldehyde vapor generated from paraformaldehyde for 5 minutes. The temperature of the reactor during the brewing was 6ϋ. Next, sulfuric acid gas was flowed into the reactor to remove the cloth, and then the ffl degree of the reactor was raised to 1ΰ0, followed by a treatment for 3 minutes.

After these two treatments, dyeing and finishing are carried out in the usual manner, and then the washing shrinkage and bending stiffness are measured by the above methods. The washing shrinkage is just 0.4%, : 1 and Β is (). 29 2 g · cm ² cm, W is 97 g and m ² , and Β W is (). Ϋ 0 30.

 Comparative Example 9

1 5th cotton ,. Polyester blended yarn (mixing ratio: 55% cotton ". Polyester (0.17 tex, fiber length-10m nu 45% by weight ^σ ) warp and weft Refined and white-treated plain woven fabric (woven density: warp: 115, about 76, inch. 0 attached: 110 0, m ² ), dimethylol hydroxyethylene ethylene urea the 6 ⁰ o, 2 .b including aqueous and Maguneshiumu chloride hexahydrate as a catalyst was applied by padding. teeth Helsingborg rate was 9 ()%. then 3 the fabric 1 0 0 hand After drying in batches, they were treated at 16ϋ for 1 minute.

After this, when you measure the ίί ¾! ¾ rate and the song only rigidity, washing shrinkage, vertical ϋ. 5 ° ο, next to 0. At 5 ⁰ ο, is Β (). 7 7 ϋ g · cm 2 / In cm, W was i 10 g / m ² , and B and \ V were 0. () 0 7 0. In this case, morphological stability was obtained but flexibility was poor. It was something.

 Comparative example 丄 0

4 Use cotton / polyester blended yarn of 5th (mixing ratio: 55% cotton., Polyester (0.17 tex, fiber length 40mm) I5 weight ^0. ) for warp and weft A plain fabric (weaving density: 115 11 'weft 76, inch, basis weight: 110 g ... m), which has been subjected to scouring and bleaching treatment, is paraformed in a closed reactor. I was asked for five minutes by formaldehyde vapor generated from aldehyde. The temperature of the reactor in question was 6 (). Next, sulfurous acid gas was flowed into the reactor to remove the cloth, and then the temperature of the reactor was raised to 160 and treated for 3 minutes.

Thereafter, when measuring the flexural rigidity and washing shrinkage, laundry shrinkage vertical 0. 5 ¾, beside ϋ. 4 ⁰ ο, ΰ at ^{0. 7 3 7 g · cm L} 'cm, W is 1 丄 0 g., M ² , and B / W became 0.00 07. In this case, morphological stability was obtained, but flexibility was poor.

 Comparative Example 1 1

45 Cotton / polyester blended yarn (mixing rate: cotton 55 wt. Polyester (0.17 tex, fiber length 40 mm) 45 wt.) Used for warp and weft, scouring and bleaching Woven fabric (weaving density: 115,76 warp, ^^, basis weight ^: 11 () «, m :) was converted to cellulose degrading enzyme (Celsoft L, 5 g 1 from Novo Nordisk). . crush i¾ the processing solution containing at a concentration, 6 0 ° C 2 h treated ¾ this in, m hydrogen processing ¾; IE fi decreased one tooth 5 ⁿ o compared to / fabric.

After that, when the washing shrinkage and bending stiffness were measured, the washing shrinkage was just ^! 5 ^Q o, horizontal 1.2 、, B is 0.224 g · cm:, cm, W is 97 g, m ² , B. W is (). became. In this case, flexibility was obtained but shape stability was poor.

 Comparative Example 1 2

 Instead of treating with a cellulose-decomposing enzyme in Comparative Example 11, the woven fabric was fcS-wasted in an aqueous solution containing 10 g of trihydric hydroxide at a concentration of 5 g i, and treated with 95 for 1 hour. The weight loss rate at this time is 13.5. . It was.

As a result, the washing recovery rate is 5% for fresh and 3 for fresh. _{At 0} , B is 0.22 8 κ ■ c m ^: .-cm, \ V is 95 g. m ² , and BW is (). () () 21. In this case, flexibility was obtained but shape stability was poor.

 Examples 5 to 8

Instead of treating with a cellulose-decomposing enzyme in Examples 64 to 67, a vertical substance was placed in an aqueous solution containing 5 g of sodium hydroxide at a concentration of 0.1, and then heated at 95 for 1 hour. Processed. Table 15 shows the results. _C Example 9-1 1 both had excellent shape stability and flexibility

 The same operation as in Example 64 was performed except that the mixing ratio of the polyester fiber was changed. The results are shown in Table 16. All had excellent morphological stability and flexibility.

 Examples 12 to 15

 The procedure was performed in the same manner as in Example 1 except that the type of the fiber reactive resin was changed. Table 17 shows the results. All had excellent morphological stability and flexibility.

 Example 1 ΰ 〜 1 9

 The operation was performed in the same manner as in Example 64 except that the drying temperature and the heat treatment temperature were changed. The results are shown in Table i8. All had excellent morphological stability and flexibility.

 Example 20 to 22

 The procedure was performed in the same manner as in Example 66, except that the temperature of the formaldehyde vapor and the heat treatment temperature were changed. The results are shown in Table 19. All of them had excellent morphological stability14: and flexibility.

 Industry 産業 Availability

ADVANTAGE OF THE INVENTION According to this invention, it can provide the fiber structure which has excellent hygroscopicity, excellent soft texture, form stability, etc., and can be widely used for clothing use.

table 1

Table 2

Table 3

 ¾ 4

 ! ίκ degree reaction rate Δ M R mass rate B / W

 (%) (%) (%)

Example 1 5 ϋ. 5 9 5. 7 5.2 0.0029 Example 1 6 1 15 10.3 4.1 0. 0031 Example 1 7 a 15 1 1. 0 4. 3 0.0037 Example 1 8 8 1 2 8.3 5.0 0.0030 Temperature Reaction rate ΔMR Weight loss rate B

(.C) (%) (%) (%)

 Example 1 9 7 0 6 5.0 5.0 0.0027 Example 2 ϋ 8 0 14 8.8 8.8 0.0030 Example 2 1 2 0 0 15 10.1 10.1 0.0043 Example 2 2 2 1 0 11 7.2 7.2 0.0039 Table 6

table

& 8

 Ρ Η Reaction rate Δ M R Weight loss rate B / W

 (%) (%) (%)

Example 3 3 ο 7 4.2 8.0 0.0028 Example 3 4 6 9 5.8 7.2 0.0030 Example 3 5 1 2 8 5.1 1 7.6 0.0035 Example 3 6 1 4 6 4.3 9.1 0.0030 Table 9

 ¾ 1 0

 Table 11

 Table 1 2

Hydrophilic vinyl monomer washing ^ Shrinkage rate Weight loss rate B ^/ W Vertical (%) Horizontal (.%) (%)

Example 5 3 dimethylolethylene urea 0.0 0.9.5.0 0.001 0031 Example 5 4 dimethyloloneuronate 0.00.9 6.3 0.0027 Example 5 5 dimethyloltriazone 1.1 1. 0 5.8 0. 0030 Example 5 6 Dimethy D-Nolepropylene Urea 0.90 0.8 5.3 0.0042 Makyu Ί / Jl i! Fl m degree Wash shrinkage Weight loss B / W

(° C) (° C) Vertical (%) 3: (%) (%)

 Example 5 7 3 0 6 0 1.8 1.6 6. [0.0025 Example 5 8 1 0 0 1 2 0 I.2 1.2 5.5 0.0027 Example 5 9 1 0 0 1 8 0 0.9 0.9 5.0 0.0030 Example 6 0 i ( ) ϋ 2 1 0 0.9 j 0.8 5.4 0.0034 Table 14

 Polyester fiber mixing rate Wash ^ S Shrinkage rate Weight loss rate B / W (% by weight) Vertical (%) Horizontal (%) (%)

Example 7 2 1 0 0.9 0.8 14.4 0.0028 Example 7 3 3 0 0.6 0.6 10.2 0.0030 Example 7 4 8 5 0.3 0.3 4.2 0.0046 Table 17

Drying temperature ¾Processing temperature Washing shrinkage Weight loss B / W

(V) (° C) Evening (%:> I horizontal (¾) (%)

 ¾ Example 7 9 3 0 6 0 0.8 0.8 14.1 0.0022 Example 8 0 1 0 0 1 2 0 0.6 0.6 13.5 0.0030 Example 8 1 1 0 0 1 8 0 0.4 0.4 12.0 0.0033 Example 8 2 1 0 0 2 1 0 0.5 0.4 10.4 0.0036 Table 1 9

 (Steam temperature) Heat treatment temperature Washing ^ Shrinkage rate Volume rate B / W

(° C) (.ji) Te (:%) 3 (:%) (9)

 ¾Example 3 3 0 H 0 0.9 1.0! 4.6 ϋ.0023 Example 8 4 6 0 1 2 0 0.5 0.6 13.0 0.0024 Example 8 6 0 1 8 0 0.5 0.5 12.2

Claims

The scope of the claims

 1. In a fibrous structure composed of cellulose fibers, a hydrophilic vinyl monomer is graft-polymerized on the cellulose male fiber, and the flexural rigidity measured by KES (Kawabata Evaluation System; measurement) (B) and the weight (W ) Ratio B \\ 'is not less than 0.ϋ0ϋ1 and not more than 0.05.

2. In-Motomeko 1, Te temperature 3 0, moisture absorption rate Micromax 2 of the fiber structure in the humidity 9 ϋ (:. ₀₎ from a temperature 2 0. (: Δ ινΐ R power represented by a value obtained by subtracting the moisture absorption rate MR 1 (¾) of the fibrous structure at a humidity of 65%) A fiber structure characterized by satisfying the following expression.

 4-: Δ M R≤ 1

 3. In a fibrous structure composed of cellulose fibers and polyester fibers, a hydrophilic vinyl monomer is graft-polymerized on the cellulose fibers, and KS

(Kawabata Evaluation System; a fibrous structure characterized in that the ratio B'W between the measured value of bending stiffness (B) and the basis weight (W) by measurement is not less than 0.001 and not more than 0.05.

 4. The moisture absorption rate M of the fibrous structure according to claim 3, at a temperature of 30 and a humidity of 9 ° C.

R 2 ("ο), the moisture absorption of the fibrous structure at a temperature of 20% and a humidity of 65% at a temperature of 20%; VI The AMR force expressed as the value obtained by subtracting R 1 (° ό); Characteristic fiber structure.

 4. 0 4, {[0 0-X Δ M R≤ 0. 1 -1 (1 ϋ 0-

 Here, X represents the ratio (weight ° ο) of the polyester fiber in the fiber structure.

5. In claim 3, the ratio of polyester fiber is 1% by weight? . A fibrous structure characterized by not less than 90% by weight.

6. In claim 1 or 3, wherein the hydrophilic vinyl-based mono-Ma reaction rate against the fiber structure of the fiber楕造was characterized and this is 2 0 wt ⁰ 0 less than 1-fold.

 7. The fiber structure according to claim 1, wherein the hydrophilic vinyl monomer is a vinyl monomer containing a sulfonic acid and / or a sulfonic acid salt.

8. The claim 1 or claim 3, wherein the value of B is not less than 0.0 0 0 1 and not more than 0.0 0 '4. A fibrous structure characterized by the fact that:

 9. The fiber structure according to claim J or 3, wherein B, W or (). () 0 ()] or more and 0.3 or less.

 10. The woven or knitted fabric according to item 1 or 3, wherein a hydrophilic vinyl monomer is graft-polymerized inside the single fiber of the cellulose fiber.

 1 1. The fiber structure consisting of cell-mouth arrowheads is subjected to a heat treatment after being impregnated with an aqueous solution containing a hydrophilic vinyl-based monomer and a polymerization initiator, before or after grafting. A method for producing a fibrous structure, characterized by performing weight reduction processing.

 1 2. A fiber structure made of polyester fiber and cellulose fiber is subjected to heat treatment after being impregnated with an aqueous solution containing a hydrophilic vinyl monomer and a polymerization initiator, before or after grafting. A method for producing a fibrous structure, characterized by performing weight reduction.

 13. The polyester fiber according to claim 12, wherein a ratio of the polyester fiber is 1 () weight. More than 9ϋ weight. ο A method for producing a fibrous structure, characterized in that:

 14. The method for producing a fibrous structure according to claim 1 or 12, wherein the hydrophilic vinyl monomer is a vinyl monomer containing sulfonic acid and / or a sulfonic acid salt.

 15. The method according to claim 11, wherein ρ Η of the aqueous solution is 6 or more and 12 or less;

 16. In the above 1 1 or i 2, the concentration of the hydrophilic vinyl monomer in the aqueous solution was 10% by weight or more and 30 times in the aqueous solution. ! A method for producing a fiber structure, characterized by the following.

17. The method according to claim 11, wherein the composite initiator is 1 weight ^{Q with} respect to the hydrophilic vinyl-based monomer. More than 5 weight °. A method for producing a fibrous structure, comprising:

 18. The method for producing a fibrous structure according to claim 11, wherein the heat treatment temperature is at least 80 and at most 200 ° C.

1 9. At the time of billing 1 1 or 12, the weight loss rate is 3 ⁽⁾ . Method for producing a male維構creature, characterized in that more than 2 0? Is ₀ or less. 2. The method for producing a fibrous structure according to claim 1 or 2, wherein the lit! 2 1. The method according to claim 1 or 12, wherein the woven fabric is immersed in an aqueous solution having a concentration of the cellulose-degrading enzyme of 11 to 30 g, I or less, at a temperature of 30 to 90 and less. A method for producing a fibrous structure, characterized by treating.

 22. The method for producing a fibrous structure according to claim 12, wherein the weight-reducing process is a weight-reduction process for polyester fibers with an alkaline compound.

23. The method for producing a fibrous structure according to claim 22, wherein the weight loss rate is 3% or more and 20 ⁽⁾ ₀ or less.

 2. The method according to claim 2, wherein the lake's structure is immersed in a water solution having a concentration of the alkaline compound of 1 Og / 1 or more and 30 () g1 or less, and the concentration of the alkaline compound is 50 C or more. (1) A method for producing a fibrous structure, comprising treating at the following temperature.

2 5. In the fiber structure made of cellulose fiber, the washing shrinkage is 3 ° ₀ or less, and the ratio of the measured bending stiffness (B) to the basis weight (W) by KES (Kawabata Evaluation System) β, W The fiber structure is characterized in that the ratio is not less than 0 ϋ 0 0 1 and not more than 0 () 0 5.

2 6. Washing shrinkage of fiber structure composed of cellulose fiber and polyester fiber is 2 ^mm . In addition, the bending stiffness side measured by KESC Kawabata Evaluation System) 'to' (B) and the basis weight ('IV ratio B, W is 0. () 0 () i or more and 0.00 0 δ or less) A textile structure characterized by the following.

2 7. The method according to claim 26, wherein the content of the cellulose fiber is I () weight °. Or 9 Y heavy ¾ hereinafter維維structure, wherein the content of the Po Riesuteru fibers is 9 Y weight ⁽⁾ ₀ or 1 Y weight "0 or less.

 28. The fiber structure according to claim 25 or 26, wherein the cellulose fiber is cross-linked with the cellulose fiber or the cellulose-reactive resin and / or formaldehyde.

 29. The fiber structure according to claim 25, wherein the washing shrinkage is 2% or less.

30. The method according to claim 25 or 26, wherein a washing shrinkage rate is 1% or less. A fiber structure.

 3 1. A fiber structure according to item 2 of the above, which has a laundry shrinkage ratio of 0.5% or less.

 3 2. The fibrous structure according to claim 25 or 26, wherein 13 / \ 'is not less than 0.01 and not more than 0.004.

 3 3. The fiber structure according to claim 25 or 26, wherein 1, is not less than 0.00001 and not more than 0.30.

 3 4. A process for producing a fibrous structure, characterized in that the cellulose fiber is subjected to a weight reduction process before or after a step of performing a crosslinking reaction on the cellulose fiber constituting the fibrous structure composed of the cellulose fiber.

 3 5. Before or after the step of performing a cross-linking reaction on the cellulose fiber constituting the male fiber structure using cellulose fiber and polyester fiber, the cell mouth fiber is reduced in weight. A method for producing a fibrous structure.

3 6. In claim 35, the content of cellulose fiber is 1 () weight ^D. Above 9 0 wt% or less, the production method of the fiber structure, wherein the content of the polyester fiber is less than 9 0 wt ¾ or 1 Y weight ^G o.

 37. The method for producing a fibrous structure according to claim 35, wherein the cellulose is impregnated with a cellulose-reactive resin, and then heat-treated to be crosslinked.

 38. The method for producing a fibrous structure according to claim 37, wherein the temperature of the heat treatment is not less than 80 and not more than 20 ().

 3 9. The method for producing a fibrous structure according to claim 34 or 35, wherein the cellulose fibers are exposed to formaldehyde vapor and crosslinked by heat treatment in the presence of a catalyst.

 40. | The method of claim 39, wherein the temperature of the heat treatment is not less than 60 and not more than 160.

4 1. The method for producing a fibrous structure according to claim 34, wherein the weight loss processing is weight reduction processing of cellulose fibers by a cellulolytic enzyme. 4 2. The method according to claim 41, wherein the weight loss rate is 3 or more and 10% or less. Manufacturing method of a fibrous structure.

 I 3. The fiber structure was immersed in an aqueous solution with a cellulolytic enzyme concentration of 1 g, 1 to 3 μg, 1 and treated at a temperature of 30 to 90, below A method for producing a fiber structure.

 4 4. The method for producing a fibrous structure according to claim 35, wherein the weight-reducing process is a weight-reducing process of polyester fiber by an alkaline compound.

 4 5. In Claim '1-1, the fiber structure is immersed in an aqueous solution having a concentration of | jJ of the alkaline compound of 1 μg, 1 or more and 300 g / l or less, and 50 to 20%. A method for producing a fibrous structure, comprising treating at a temperature of 0 ° C or less.

 4 6. The method for producing a fibrous structure according to claim 44, wherein the weight loss rate is 3% or more and 20% or less.

 4 7. The method for producing a fibrous structure according to claim 3I or 35, wherein the fibrous structure is a sewn product, and the weight reduction process is performed before the sewing.

 4 8. The method for producing a fibrous structure according to claim 11, 12, 13, 34 or 35, wherein the weight reduction processing is performed using a liquid jet dyeing machine.

 4 9. The method for producing a fibrous structure according to claim 11,12, 34, or 35, wherein the weight reduction is performed using an airflow dyeing machine.